Various 14-group elements were inserted in the skutterudite-type CoSb3 host lattice under high-pressure and temperature conditions of 8 GPa and 550 °C using the Belt-type high-pressure equipment. It was found that various elements could be inserted in the body-centered vacant site, resulting in the formation of new filled-skutterudites MxCo4Sb12 (M: Ge, Sn, Pb). The composition and the degree of space-filling were determined by the Rietveld analysis and the density measurements. Maximum space-filling was determined to be 50% for M = Ge, 100% for M = Sn, and 70% for M = Pb. The inserted Sn atom shows anomalous large thermal vibration amplitude, while Pb atom does not. The Ge atom locates the position slightly deviated from the ideal body-centered position.
|Number of pages
|Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
|Published - 1999 Oct